Course not, ignore that. Everett tries to hit the ball to all fields. He runs well and typically puts the bat on the ball. His instruction from the team is to make contact and work the count. This fits well in the second spot in the context of the Astros. Ensberg's job is to jump on the first pitch he can hit and drive the ball. He's more suited for the 5th or 6th spot, on this team.
The things you and Eastex Fwy said are the most important. Given those, I would add that Everett at #2 spreads out the power/RBI potential in the lineup more effectively than if AE is hitting #7. The idea a #2 simply
must be a high OBP guy is a relatively new one, and comes either from fantasy ball or certain Bill James' postcedents, or both. Sure, if one's lineup is stacked top-to-bottom with good hitters, pick a "god of walks" for your #2, and set sail. But now and historically, most non-NYY lineups have had inefficiencies here and there; certainly the 2007 Astros will. For the most part #2 has always been one of the most least well-defined lineup slots in terms of what attributes the hitter there should possess. But very generally, managers have often used the #2 hole for a guy like AE, offensively as an adjunct to the #1 (that doesn't mean just sac bunts, either), and as a lineup "spacer", for lack of a better term, in order to better allocate the offensive resources they do have at hand.
I understand the argument one wants to maximize the amount of one's best hitters' at bats, and a #2 will come up a couple dozen times more during a season than a #7 will. Makes sense, too; but it is kind of a superficial argument, since it does not seem to take into account the dynamics of the rest of the lineup the #2 guy is hitting in. Would it be better to have a high OBP guy who can also hit at #2 and an intermittent singles hitter at #7? Or rather a guy of narrowly defined (but perhaps useful) offensive skills at #2 and another RBI guy at #7? I also understand the argument that winning teams usually score more runs in one big inning than their opponent does over the whole game. But still is it better to bunch all the best hitters to the top of a lineup and have every third inning or so consist of a 7-8-9 hitting a combined .220 with no power? Or rather bury one of the proposed 7-8-9 amongst more accomplished hitters at the top of the lineup, and have the RBI potential of the lineup cover slots 1-7 instead of 1-6?
I don't really know the answers in empirical terms, but I sometimes wonder if things like this are taken into account at all when one looks at lineup building strictly in terms of OBP or OPS.